Air-compressor.



G. WAINWRIGHT.

AIR OOMPRESSOR. APPLICATION FILED 0GT.31,1911, RENEWED JULY 2, 1914. 1 1 31,57?

latented Mar. 9, 1915.

4 SHEETS-SHEET 1.

A TTORNE V.

THE NORRIS PETERS-0 PHDTO-LITHO.. WASHINGTON, D. c.

G. WAINWRIGHT.

AIR COMPRESSOR.

APPLICATION FILED OCT. 31, 1911. RENEWED JULY 2, 1914.

Patented Mar. 9, 1915.

4 SHEBTSSHEET 2.

G. WAINWRIGHT.

AIR COMPRESSOR. APPLICATION FILED OCT.

31,1911. RENEWED JULY 2,1914- 1,]. 31,577. Patented Mar. 9, 1915.

4 SHEETSSHEET 4.

WITNESSES.-

THE NORRIS PETERS 60., PHoTo-uTHa, WASHINGTON o c NTTFJD TAWFZ CHARLES WAINVJBIGEIT, F ERIE, PENNSYLVANIA.

AIR-COMPRESSOR.

Application filed October 31, 1911, Serial No. 657,697.

To all whom it may concern Be it known that I, CHARLES VVAIN- wnrcrrr, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Air-Compressors, of which the following is a specification.

The general object of the invention is to arrange the several parts of a single, multiple stage, or duplex air compressor so that the compressor will form a compact unit and occupya minimum length of floor space when set up and ready for use.

Other objects will appear and be better understood from the following description taken in connection with the accompanying drawings, in which,

Figure 1 is a plan of one embodiment of the invention. Fig. 2 is a detail side elevation thereof. Fig. 3 is a detail vertical section taken through one of the frames. Fig. -i is a vertical cross section approximately on the line M of Fig. 8. Fig. 5 is a detail vertical cross section of one of the air cylinders. Fig. 6 is a detail vertical. longitudinal section of the intercooler. Fig. 7 is a detail front elevation of one of the centering blocks for the cross head guides. Fig. 8 is a detail side elevation of the cross head with the removable sides of the lower bearing boxes detached. Fig. 9 is a detail end elevation of Fig. 8.

For duplex multiple stage, or duplex high pressure compression I make use of apair of frames 55 each in the form of a casing, and connect the frames by a cross piece 6 which may be cast integral with or otherwise secured to the frames 5-5. In the space between the frames 55 I arrange a motor, the fly wheel of which is shown in Figs. 1 and 2 and designated by the numeral 7. The particular kind of motor for driving the fly wheel 7 is immaterial, hence the said motor may be electric, steam or in fact any kind, depending entirely on the desire of the user or on the specie which is most economical to operate in the section where the compressor is employed. The opposite ends of the crank shaft 8 extend into the frames 55 and the cranks, one of which is shown in Fig. 3 and designated by 9, connect to the connecting rods one of which is shown in the same figure and designated by 10.

The connecting rods 10 connect to the wrist pins, one of which is shown in Figs.

Specification of Letters Patent.

Patented Mar. 29, 1915.

Renewed July 2, 191%. Serial No. 848,695.

3 and 4 and indicated by 11, which are carried by the cross heads one of which is shown in the same figures and designated by 12. The connections between the cross heads and cranks are such that the circular motion of the cranks will impart rectilinear motion to the cross heads. The cross heads are each formed with guide openings 13-13 which receive the guides 1414. Each opening is preferably lined with a bushing 15 of suitable material, and to facilitate the operation of mounting or dismounting of the cross heads from the guides, I preferably form a portion of each guide opening 13 in av section 16 which is adapted to intert with the cross head and to be secured thereto in any preferred manner such as by the screws 17-47 and nuts 18-18.

19-19 indicate the centering blocks shown in detail in Fig. 7. Referring to Fig. 3 the blocks in each frame are supported by suitable beams 20-20 and are locked in adjusted position by set screws 2121 which screw into the frames, as shown in Figs. 1 and 3 and enter depressions 22 in the blocks. The blocks are bored as shown at 23*23 in Fig. 7 to receive the guides 1 17-14 which are held, in any preferred manner against longitudinal movement in the blocks, such as by heads 2%L24 detachably secured to the opposite ends of the guides, all of which is shown in Fig. 3. The blocks 19-19 are also bored to admit of the passage of the low and high pressure piston rods designated respectively by 25 and 26. The piston rods 25 and 26 connect with their pistons (not shown) which are contained in the low and high pressure cylinders designated respectively by 27 and 28 and located at the opposite ends of the frames 55. The rods 25 and 26 also detachably connect to their respective cross head, as shown in Fig. 3. Any improved or desired construction may be employed for connecting the piston rods to the cross heads and that shown in Fig. 3, where the rods are threaded and screwed into the cross head and locked by nuts 29, is simply illustrative and need not be adhered to.

The cylinders 27 and 28 may be of any preferred or well-known construction such as that shown in section in Fig. 5 where 30 indicates the inlet which communicates with a duct 31 extending through a jacket and into either end of the cylinder. 32 is the outlet or discharge. The various valves our ployed with the inlets and outlets are not shown. The only difference between the high and low pressure cylinders in the pres ent construction, resides in the relative positions of the inlet and outlet openings in each cylinder and this, of course, is due to the particular type of cylinders employed. But since my invention does not include any particular type of cylinder or cylinders, it will be understood that the structure herein shown is simply to illustrate one embodiment of the invention.

The air from the low pressure cylinders 27 passes through the pipes 3333 connecting the outlets 82 with the intercoolers, one of which is shown in Figs. 4 and 6 and designated in general by 34:. The intercoolers 34 may be of any desired or preferred construction and the casing 35 of each intercooler contains a number of inner tubes 36-36 which connect with a tube plate 37 which forms one side of a pocket 38 into which fluid. is directed from a supply pipe 39 which conveys the fluid from a suitable source or pumping apparatus (not shown). The fluid circulates through the inner tubes 36 and through the outer tubes 40 which are closed at one end, as shown at all and held at their opposite ends by a tube plate 42 which forms one side of a pocket 43 into which the liquid from the tubes 42 is discharged and from which it is taken in any preferred manner. The air discharged into the intercoolers from the low pressure cylinders, passes through the space indicated by 4-4 in Figs. 4 and 6 and through the outlet pipes 45, one of which is shown in Fig. 2, and into the high pressure cylinders 28 and thence through the pipes 4646 which connect the discharges or outlets of the high pressure cylinders with the union 47 which is connected by a conveyer (not shown) to a reservoir or to a place of use. Although the intercoolers are shown as arranged in the lower portions of the frames 5-5', it will be manifest that this arrangement need not be adhered to since, if the intercoolers were otherwise arranged such as on the upper portions of the frames, the operation of the device as just described would be the same. The hand-hold plates 4848 are detachably secured to the frames 55 and normally seal the openings through which the condition of the parts arranged in the frames may be observed when the plates are removed.

here the service of a duplex multiple stage compressor is not required, my device may bemodified to meet requirements by simply eliminating one of the frames and the parts connected thereto. In which event, of course, a type of crank shaft difierent from that described, to wit, a shaft provided with one crank only, will be employed. A further adaptation or arrangement of parts may be effected by placing a steam cylinder at the end of one of the air cylinders when single multiple stage compression is required, or placing a steam cylinder at the end of corresponding air cylinders on one end of the frames when duplex multiple stage compression is required and suitably connecting the piston rod or rods, as the case may be,of these steam cylinders with a cross head or cross heads to which may be detachably secured the piston rod or rods of the pistons in the air cylinders and the usual connecting rods for the crank shaft which in turn operates suitable valve mechanism for the cylinders. course, come within the skill of the ordinary mechanic, therefore this description is deemed sufiicient and need not be supported by illustration. lVhere single or duplex high compression only is required, my device can be readily adapted to meet requirements by detaching the low pressure piston rod or rods, as the case may be, from the cross head or cross heads.

From the foregoing it will have been observed that the device is exceedingly simple in structure and when employed as a duplex compressor, has a volume of high compression discharged far in excess of any compressor known to me and occupying the same length of floor space.

That I claim as new is:

In an air compressor, the combination with a frame and pump mechanism mounted on the frame and including piston rods; of a pair of centering blocks detachably secured to the frame and arranged in spaced relation, cross head guides connected to said centering blocks, and a cross head adapted for connection to the piston rod of the pump mechanism and including detachable sections mounted on said guides.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES lVAINWRIGHT.

Witnesses:

Finn) J. CARNEY, JAMES N. ALLBURN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

These adaptations of r 

